W28F641B Datasheet, PDF (27/31 Pages) Winbond – 64MBIT (4MBIT × 16) PAGE MODE DUAL WORK FLASH MEMORY

W28F641B/T
4. A latency time is required from writing suspend command (#WE or #CE going high) until SR.7 going "1".
5. If the interval time from a Block Erase Resume command to a subsequent Block Erase Suspend command is shorter than
tERES and its sequence is repeated, the block erase operation may not be finished.
5. ADDITIONAL INFORMATION
Recommended Operating Conditions
At Device Power-Up
AC timing illustrated in Figure A-1 is recommended for the supply voltages and the control signals at
device power-up. If the timing in the figure is ignored, the device may not operate correctly.
V_DD
#RESET ^(p)
V_DD ^(min)
Vss
VIH
V _IL
Vpp
*1
(V)
V _PPH1/2
Vss
VIH
ADDRESS (A) _VIL
VIH
#CE (E)
VIL
VIH
#WE (W)
VIL
VIH
#OE (G) _VIL
#WP
VIH
(S)
VIL
VOH
DATA (D/Q)
VOL
t_VR
t_2VPH
t PHQV
t_{R or} t_F
t_AVQV
Valid Address
t_F
t _ELQV
t_{R or} t_F
t_R
t_F
t _GLQV
t_R
HIGH Z
Valid Output
*1 To prevent the unwanted writes, system designers should consider the design, which applies VPP to 0V during read
operations and VPPH1/2 during write or erase operations.
Figure A-1. AC Timing at Device Power-up
For the AC specifications t_VR, t_R, t_F in the figure, refer to the next page. See the “ELECTRICAL SPECIFICATIONS“ described in
specifications for the supply voltage range, the operating temperature and the AC specifications not shown in the next page.
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Publication Release Date: March 27, 2003
Revision A3